mirror of https://github.com/k3s-io/k3s
130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package v2
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import (
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structuralschema "k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
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)
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// ToStructuralOpenAPIV2 converts our internal OpenAPI v3 structural schema to
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// to a v2 compatible schema.
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func ToStructuralOpenAPIV2(in *structuralschema.Structural) *structuralschema.Structural {
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if in == nil {
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return nil
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}
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out := in.DeepCopy()
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// Remove unsupported fields in OpenAPI v2 recursively
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mapper := structuralschema.Visitor{
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Structural: func(s *structuralschema.Structural) bool {
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changed := false
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if s.ValueValidation != nil {
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if s.ValueValidation.AllOf != nil {
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s.ValueValidation.AllOf = nil
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changed = true
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}
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if s.ValueValidation.OneOf != nil {
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s.ValueValidation.OneOf = nil
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changed = true
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}
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if s.ValueValidation.AnyOf != nil {
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s.ValueValidation.AnyOf = nil
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changed = true
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}
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if s.ValueValidation.Not != nil {
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s.ValueValidation.Not = nil
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changed = true
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}
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}
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// https://github.com/kubernetes/kube-openapi/pull/143/files#diff-ce77fea74b9dd098045004410023e0c3R219
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if s.Nullable {
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s.Type = ""
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s.Nullable = false
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// untyped values break if items or properties are set in kubectl
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// https://github.com/kubernetes/kube-openapi/pull/143/files#diff-62afddb578e9db18fb32ffb6b7802d92R183
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s.Items = nil
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s.Properties = nil
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changed = true
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}
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if s.XPreserveUnknownFields {
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// unknown fields break if items or properties are set in kubectl
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s.Items = nil
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s.Properties = nil
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changed = true
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}
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if s.Items == nil && s.Type == "array" {
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// kubectl cannot cope with array without item schema, e.g. due to XPreserveUnknownFields case above
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// https://github.com/kubernetes/kube-openapi/blob/64514a1d5d596b96e6f957e2be275ae14d6b0804/pkg/util/proto/document.go#L185
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s.Type = ""
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changed = true
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}
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if s.XPreserveUnknownFields && s.Type == "object" {
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// similar as above, kubectl doesn't properly handle object fields with `x-kubernetes-preserve-unknown-fields: true`
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s.Type = ""
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changed = true
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}
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for f, fs := range s.Properties {
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if fs.Nullable {
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s.ValueValidation.Required, changed = filterOut(s.ValueValidation.Required, f)
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}
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}
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if s.AdditionalProperties != nil && s.AdditionalProperties.Structural != nil && s.AdditionalProperties.Structural.Nullable {
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s.ValueValidation.Required, changed = nil, true
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}
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return changed
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},
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// we drop all junctors above, and hence, never reach nested value validations
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NestedValueValidation: nil,
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}
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mapper.Visit(out)
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return out
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}
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func filterOut(ss []string, x string) ([]string, bool) {
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var filtered []string
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for i, s := range ss {
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if s == x {
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if filtered == nil {
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filtered = make([]string, i, len(ss))
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copy(filtered, ss[:i])
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}
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} else if filtered != nil {
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filtered = append(filtered, s)
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}
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}
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if filtered != nil {
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if len(filtered) == 0 {
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return nil, true
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}
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return filtered, true
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}
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return ss, false
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}
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